WO2017113606A1

WO2017113606A1 - Integrated hydraulic cylinder having telescoping function and swinging function and application thereof

Info

Publication number: WO2017113606A1
Application number: PCT/CN2016/084698
Authority: WO
Inventors: 曾庆良; 许德山; 万丽荣; 逯振国
Original assignee: 山东科技大学
Priority date: 2015-12-30
Filing date: 2016-06-03
Publication date: 2017-07-06
Also published as: CN105443498B; CN105443498A

Abstract

Disclosed are an integrated hydraulic cylinder having a telescoping function and a swinging function and an application thereof. The hydraulic cylinder comprises a cylinder bottom (1), a cylinder barrel (4), a cylinder cap (7), a piston (3), and a piston rod (6). The piston (3) is disposed in the cylinder barrel (4) and comprises a cavity. A left end cover (2) and a right end cover (15) are respectively provided on two sides of the piston (3). One end of the piston rod (6) passes through the right end cover (15) to be situated in the cavity. Baffles are oppositely disposed on the piston rod (6) and the left end cover (2). An axial hole (12) leading to the cavity is opened on the piston rod (6). When oil is supplied through the axial hole (12), oil pressure formed between the baffles pushes the baffle on the piston rod (6) to drive the piston rod (6) to rotate. A telescoping function and a swinging function are implemented by an integrated hydraulic cylinder structure, so that a higher integration level is achieved and manufacturing costs are reduced. Moreover, the telescoping function and the swinging function are independent from each other, and the swinging is more accurate; thus, the control accuracy is improved and higher use requirements of a working environment are satisfied.

Description

Integrated hydraulic cylinder with telescopic and swinging function and application thereof

Technical field

The invention relates to an integrated hydraulic cylinder with a telescopic and swinging function and an application thereof, and belongs to the technical field of hydraulic cylinders.

Background technique

The hydraulic cylinder is hydraulic energy into mechanical energy, linearly reciprocating movement (or swing movement) of the hydraulic actuators. It is simple in structure and reliable in operation. When it is used to realize the reciprocating motion, the speed reducing device can be eliminated, and there is no transmission gap, and the motion is stable, so it is widely used in various mechanical hydraulic systems . At present, the two movements of the hydraulic cylinder telescopic and swing must be completed using two cylinders, which increases the manufacturing cost of the hydraulic cylinder and takes up a large space. Most of the current telescopic and rotating mechanisms are electric or pneumatic, and the forces and moments obtained in a limited space are not large enough. Because the compressibility of the gas is too large, the mechanism of the pneumatic swing is usually not accurately positioned.

For example, Chinese Patent Publication No. CN202220769U discloses a telescopic rotary hydraulic cylinder including a cylinder block, a piston and a piston rod, and a piston rod is arranged on both sides of the piston, and the piston is disposed between at least one piston rod and the cylinder block. The rotary guiding device comprises a spiral guiding groove formed on the piston rod, and the screw guiding groove is fixed on the inner wall of the cylinder body with a finite position screw plug, and the limiting screw plug is caught in the spiral guiding groove and can be along the spiral guiding groove The sliding, telescopic rotary hydraulic cylinder adds a matching spiral guiding groove and a limit pin between the piston rod and the cylinder block. When the piston rod of the hydraulic cylinder is in linear motion, the limit pin stuck in the spiral guiding groove will The piston rod is driven to rotate at the same time, so that the piston rod completes the rotating motion while performing a linear motion. Although the hydraulic cylinder has a simple structure and reliable operation, the rotation of the piston rod cannot be accurately controlled, and for some occasions where the rotation precision is relatively high, the accuracy requirement cannot be met.

Chinese Patent Publication No. CN105041758A discloses a rotary telescopic integrated hydraulic cylinder in which a piston rod passing through an upper end cover is provided in a main cylinder, an upper portion of a torque rotating shaft is inserted into a bottom portion of a piston rod, and a lower sleeve of the insertion portion is provided with a sliding sleeve. The sliding sleeve is fixed with the piston rod, and the telescopic piston is arranged under the shoulder of the piston rod, the piston rod is rotated relative to the telescopic piston, the telescopic piston is moved and disposed in the main cylinder tube, and the cylinder barrel is fixed with a screw cylinder. The middle and the lower part of the torque transmission shaft are located in the spiral cylinder, and the spiral cylinder is rotated to provide a spiral piston, and the lower part of the torque transmission shaft is screwed to the inner wall of the receiving chamber. The part of the hydraulic cylinder of the present invention that realizes the rotating function is disposed in the main cylinder tube, and maintenance is not required. The present invention can realize the rotation function while realizing the expansion and contraction, but the structure of the hydraulic cylinder is complicated and the manufacturing process is troublesome. Hydraulic cylinders are also unable to precisely control the purpose of rotation.

Therefore, it is urgent to design an integral hydraulic cylinder with telescopic and oscillating functions to meet the telescopic and oscillating functions. Under the premise, the rotation angle of the piston rod can be precisely controlled.

Summary of the invention

In view of the deficiencies of the prior art, the present invention provides an integrated hydraulic cylinder having a telescopic and oscillating function.

The present invention also provides a method of using the above-described one-piece hydraulic cylinder having a telescopic and oscillating function.

The technical solution of the present invention is as follows:

An integrated hydraulic cylinder having a telescopic and oscillating function, the hydraulic cylinder comprising a cylinder bottom, a cylinder barrel, a cylinder head, a piston and a piston rod, the piston being disposed in the cylinder tube and including a cavity, characterized in that it further comprises a left end The cover and the right end cover, the left end cover and the right end cover are respectively disposed on two sides of the piston, one end of the piston rod passes through the right end cover and is located in the cavity, and the other end passes out the cylinder head. In the cavity, the piston rod and the left end cover are oppositely A partition plate is arranged, and an axial hole leading to the cavity is opened on the piston rod. When the axial hole is supplied with oil, an oil pressure is formed between the partition plate on the piston rod and the partition plate on the left end cover, and the oil pressure Pushing the diaphragm on the piston rod to rotate, thereby driving the piston rod to rotate.

Preferably, the piston rod is provided with a disc, and the partition plate is disposed on one side of the disc. The partition plate is provided with a first groove, and the two sides of the partition plate are provided with the axial hole. Radial holes.

Preferably, the left end cover comprises a body, the partition plate is disposed on one side of the body, and the second groove is disposed on the partition plate.

Preferably, the body is a stepped cylinder comprising two first cylinders and a second cylinder having different diameters, and the partition is located on the second cylinder.

Preferably, the first cylinder is bolted to the piston.

Preferably, a third recess is further disposed on the second cylinder, and the third recess is a circular recess and is located on one side of the partition.

Preferably, two axial holes are arranged in the axial direction of the piston rod, and the radial holes on both sides of the partition plate are respectively communicated with the two axial holes.

Preferably, a gasket is disposed in the first groove, the second groove and the third groove. The benefit of this design is that the gasket allows the hydraulic fluid to be truly sealed within the piston cavity to prevent leakage.

Preferably, the hydraulic cylinder further comprises at least one guiding rod, and the two ends of the guiding rod are connected to the cylinder bottom and the cylinder head respectively after the piston.

A method for using an integrated hydraulic cylinder having a telescopic and oscillating function, comprising the following steps,

When the piston rod needs to extend or contract, the hydraulic cylinder can be extended or contracted by the oil port to pressurize or relieve pressure. When the piston rod needs to swing, the hydraulic cylinder sequentially passes through the axial hole and the radial hole. Hydraulic oil is input into the piston cavity, and the hydraulic oil has oil pressure between the two partitions, and the oil pressure pushes the diaphragm to rotate, thereby driving the piston rod to rotate.

The beneficial effects of the invention are:

1. The integrated hydraulic cylinder of the invention changes the structural form of the traditional hydraulic cylinder, and realizes the telescopic and swinging functions through the integrated hydraulic cylinder structure, thereby eliminating the disadvantages of the conventional hydraulic cylinder using two cylinders for oil to realize the expansion and swing function. The hydraulic cylinder is more integrated, and the structural space of the hydraulic cylinder is reduced, thereby saving manufacturing costs;

2. The integrated hydraulic cylinder of the invention has independent swinging and telescopic movements, and the swinging function controls the swing angle of the piston rod more accurately by the oil hydraulic pressure, thereby improving the precision of the control, and can achieve precise positioning compared with the conventional hydraulic cylinder, and can satisfy some uses. A higher working environment is required.

3. The integrated hydraulic cylinder of the invention has the advantages of simple structure, ingenious design, convenient assembly and use, obvious effect and remarkable effect, good economic benefit and market value, and is worthy of popularization and application.

DRAWINGS

Figure 1 is a schematic structural view of an integrated hydraulic cylinder of the present invention;

2 is a schematic structural view of a left end cover according to the present invention;

Figure 3 is a schematic structural view of a piston rod of the present invention;

Figure 4 is a schematic view showing the structure of the piston rod and the left end cover in the present invention;

FIG. 5 is a partial structural schematic view of the piston rod, the left end cover and the piston in the present invention.

Among them: 1, cylinder bottom; 2, left end cover; 3, piston; 4, cylinder; 5, guide rod; 6, piston rod; 7, cylinder head; 8, guide rod; 9, second groove; a third groove; 11, a bolt hole; 12, an axial hole; 13, a first groove; 14, a radial hole; 15, a right end cover.

detailed description

The invention will be further illustrated by the following examples in conjunction with the accompanying drawings, but not limited thereto.

Example 1:

As shown in FIG. 1, an integrated hydraulic cylinder having a telescopic and oscillating function includes a cylinder bottom 1, a cylinder 4, a cylinder head 7, a piston 3 and a piston rod 6, and the piston 3 is placed in the cylinder 4, and the piston 3 A cavity is included, and a left end cover 2 and a right end cover 15 are respectively mounted on both sides of the piston 3. The piston rod 6 has one end running through the right end cover 15 and then passing through the cylinder cover 7 at the other end.

The left end cover 2 includes a body, the body is a stepped cylinder, and includes two first cylinders and a second cylinder having different diameters. The first cylinder is provided with a bolt hole 11 and the left end cover is connected with the piston 3 by bolts. A partition is provided on the second cylinder. The piston rod is provided with a disc, a partition is arranged on one side of the disc, two axial holes 12 are defined in the axial direction of the piston rod, and a diameter communicating with the axial hole is arranged on both sides of the partition plate. To the hole 14. Within the cavity, the baffle on the left end cap opposes the baffle on the piston rod, dividing the cavity into mutually independent first and second chambers. Left end cap The cooperation relationship with the piston rod is shown in Fig. 4.

In the hydraulic cylinder described in this embodiment, the expansion and contraction of the piston in the cylinder is realized by the oil port on the cylinder of the hydraulic cylinder. By supplying oil to the axial hole, an oil pressure is formed between the piston rod and the left end cover in the cavity, and the oil pressure pushes the diaphragm on the piston rod to rotate, thereby driving the piston rod to rotate. The invention realizes the expansion and contraction of the piston rod by different oil ports, and the telescopic and swing functions are independently controlled.

Example 2:

An integral hydraulic cylinder having a telescopic and oscillating function, the structure is as described in Embodiment 1, except that the partition on the piston rod 6 is provided with a first groove 13 on the partition of the left end cover. The second groove 9 is opened, and the third groove 10 is opened on the second cylinder. The third groove 10 is a circular groove. When the piston rod 6 is fitted with the left end cover 2, one end surface of the piston rod Contact with a circular groove.

A gasket is disposed in each of the first groove 13, the second groove 9, and the third groove 10. By adding a gasket in the groove, the hydraulic oil can be truly sealed in the piston cavity to prevent leakage, so that the first chamber and the second chamber are truly isolated from each other, preventing the occurrence of oil and affecting the rotation thereof. Precision control.

Example 3:

An integrated hydraulic cylinder with telescopic and oscillating functions, the structure is as described in Embodiment 2, and the difference is:

Two guiding rods 5 are further disposed in the cylinder 4 of the hydraulic cylinder. The two guiding rods 5 are symmetrically disposed on the upper and lower sides of the cavity. After the guiding rod 5 penetrates the piston, the two ends thereof are respectively connected with the cylinder bottom and the cylinder head 7. connection. When the oil is supplied to the axial hole to realize the swinging function of the piston rod, the guide rod can restrict the rotation of the piston, and only the rotation of the piston rod can be realized, and the telescopic and swing functions can be independently controlled.

Example 4:

A method for using an integrated hydraulic cylinder having a telescopic and oscillating function as described in Embodiment 3, comprising the following steps,

When the piston rod 6 needs to be extended or contracted, the hydraulic cylinder can be extended or contracted by the oil port to pressurize or release the pressure (the expansion process of the piston is the same as that of the existing piston), when the piston rod 6 When the swinging is required, the hydraulic cylinder sequentially inputs hydraulic oil into the cavity of the piston 3 through the axial hole 12 and the radial hole 14. The hydraulic oil has oil pressure between the two partitions, and the hydraulic pressure pushes the partition to rotate. Thereby, the piston rod 6 is rotated; the guide rods 5 on the upper and lower sides function to restrict the rotation of the piston 3, and the piston 3 can only linearly expand and contract in the cylinder.

Claims

An integrated hydraulic cylinder having a telescopic and oscillating function, the hydraulic cylinder comprising a cylinder bottom, a cylinder barrel, a cylinder head, a piston and a piston rod, the piston being disposed in the cylinder tube and including a cavity, characterized in that it further comprises a left end The cover and the right end cover, the left end cover and the right end cover are respectively disposed on two sides of the piston, one end of the piston rod passes through the right end cover and is located in the cavity, and the other end passes out the cylinder head. In the cavity, the piston rod and the left end cover are oppositely A partition plate is arranged, and an axial hole leading to the cavity is opened on the piston rod. When the axial hole is supplied with oil, an oil pressure is formed between the partition plate on the piston rod and the partition plate on the left end cover, and the oil pressure Pushing the diaphragm on the piston rod to rotate, thereby driving the piston rod to rotate.
The integrated hydraulic cylinder having a telescopic and oscillating function according to claim 1, wherein the piston rod is provided with a disc, and the partition plate is disposed on one side of the disc, and the partition plate is provided with The first groove is provided with radial holes communicating with the axial holes on both sides of the partition.
The integrated hydraulic cylinder having a telescopic and oscillating function according to claim 2, wherein said left end cover comprises a body, said partition is disposed on one side of said body, and said second concave is disposed on said partition groove.
The integrated hydraulic cylinder having a telescopic and oscillating function according to claim 3, wherein the body is a stepped cylinder comprising two first cylinders and a second cylinder having different diameters, and the partition is located On the second cylinder.
The integrated hydraulic cylinder having a telescopic and oscillating function according to claim 4, wherein said first cylinder is bolted to the piston.
An integrated hydraulic cylinder having a telescopic and oscillating function according to claim 4, wherein a third groove is further disposed on the second cylinder, and the third groove is a circular groove and is located One side of the partition.
An integrated hydraulic cylinder having a telescopic and oscillating function according to claim 2, wherein two axial holes are provided in the axial direction of the piston rod, and the radial holes on both sides of the partition are respectively The axial holes are connected.
The integrated hydraulic cylinder having a telescopic and oscillating function according to claim 6, wherein a gasket is disposed in each of the first groove, the second groove and the third groove.
The integrated hydraulic cylinder with telescopic and oscillating functions according to claim 1, wherein the hydraulic cylinder further comprises at least one guide rod, and the two ends of the guide rod penetrate the piston and the cylinder bottom and the cylinder head respectively connection.
A method of using an integrated hydraulic cylinder having a telescopic and oscillating function according to any one of claims 1-9, comprising the following steps,

When the piston rod needs to extend or contract, the hydraulic cylinder can be extended or contracted by the oil port to pressurize or relieve pressure. When the piston rod needs to swing, the hydraulic cylinder sequentially passes through the axial hole and the radial hole. Hydraulic oil, liquid input into the piston cavity The oil pressure has an oil pressure between the two partitions, and the oil pressure pushes the diaphragm to rotate, thereby driving the piston rod to rotate.